Attachment for printing-presses.



. 110.833.553. PATENTED OCT. 16, 1906;

H. J. SGHOEN.

ATTACHMENT FOR. PRINTING PRESSES. APPLICATION Him) 11101.24, 1906.

UNITED sTATEs PATENT oEEioE.y

Specification of Letters Patent.

Application filed April 24, 1906. Serial No. 313,368.

Patented Oct. 16, 1906.

To all whom/ it indy concern;

Beit known that I, HERMAN J. SoHoEN, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Attachments for Printing-Rresses, of which the followingI is a specification.

My invention relates to attachments for printing-presses. y

It has for its object to provide an attachment for printing-presses embodying means for adjustably supporting a platen thereon, whereby it may be advanced or retracted to the proper position required to obtain a perfect impression from a plate. v

It has for a further object to provide an attachment of the character described, which is simple and inexpensive in construction, easily operated, and which will be perfectly rigid in its adjusted position.

In the drawings, Figure 1 is a plan view of my attachment; Fig. 2, a transverse sectional view Fig. 3, a "longitudinal sectional view, the platen being removed; Fig. 4, a bottom plan view of the platen, and Fig. 5 a perspective view of one of the blocks for advancing or retracting the platen.

like reference characters designate corresponding parts in all the figures of the drawings illustrating my invention.

Referring to the drawings, 1 designates the box or base, which as usual in all plate-printing presses, is adapted to be reciprocally supported on the press so as toallow it to be brought into and out of contact with the plate being printed from.

Blocks 2 and A3 are secured side by side within the box by means of longitudinal dovetail pro`ections 4 and 5, respectively, on their under faces slidably engaging longitudinal dovetail grooves 51L and 6a, respectively, in the bottom of said box, the block 2 being provided with an inclined upper face 6 and a dovetail projection 7 thereon inclined in the same direction as said upper face and the block 3 bein 'provided with an upper face 8 inclined in t e opposite direction to the face 6 of the other block and having a dovetail projection 9 thereon inclined in the same direction as said upper face, but in the opposite direction to the projection of the other block. A platen 10 is supported within the box upon Said blocks and is provided with oppositelyinclined under faces 9a and 10a, slidably engaged by the faces 6 and 8, respectively, of

tively engaged by Ian idler-pinion 14, rotatably journaled on a stub-shaft 15, secured in a hole in the bottom of the box or 'base 1, whereby the blocks are madeto move in opposite directions.

A screw-threaded shaft lextends through a screw-threaded hole 17 in one end of the boxor base, one end of said shaft being provided with a head 18, rotatably engaging a slot 19 in one end of the block 3 and the other end being squared to provide for the engagement of a wrench for turning it.

It will be appreciated that the attachment constructed in the manner above described will be easily and readily adjustable and form a solid support for the platen, thereby rendering it possible to take a perfect impression from a plate being printed from.

The operation is as follows: It lbeing assumed that the blocks are in the position shown by Figs. 1 to 3, inclusive, in which position the platen will be in its advanced position, to retract the/platen'the shaft is turned in the direction to force it inwardly, with the result that the block 3 will be slid to the left,

and by reason of the idlerpinion meshing with the racks of the blocks the block 2 will be concurrently slid to the right, and by reason of the inclined upper faces of the blocks riding against the inclined under faces of the platen it will be retracted, and to advance the platen a ain the shaft is turned in the direction to raw it outwardly, thereby forcing the blocks to move concurrently in the reverse direction to that above described.

I do not wish to limit myself to the precise details and arrangements of parts shown and described, but reserve the right to all modifications within the scope of my invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. An attachment for printing-presses embodying a base, blocks laterally disposed reciprocal concurrently thereon side by side 1n opposite directions, a platen supported on said blocks and means for reciprocating said blocks to advance or retract said platen, substantially as described.

IOO

IIO

2. An attachment for printing-presses embodying a base, blocks laterally disposed concurrently reciprocal thereon side by side in opposite directions, a platen supported on said blocks, means for slidably securing said blocks on said base and to said platen and means for reciprocating said blocks to ad- Vance or retract said platen, substantially as described.

3. An attachment for printing-presses embodying a base, vblocks concurrently reciprocal thereon side by side in opposite directions and having racks, a pinion meshing with said racks a platen supported on said blocks and means for reciprocating said biocks to advance or retract said platen, substantially as described.

4. An attachment for printing-presses, embodying a box, blocks concurrently reciprocal therein side by side in opposite directions and having racks, a pinion meshing with said racks a platen supported on said blocks and means for reciprocating said blocks to advance or retract said platen, substantially as described.-

5. An attachment for printing-presses embodying a base, blocks concurrently recipro cal thereon sideby side in opposite directions and having racks, a pinion meshing with said racks, a platen supported on said blocks, means for slidably securing said blocks on said base and to said platen and means for reciprocating said blocks to advance or retract said platen, substantially as described.

6. An attachment for printing-presses embodying a base, blocks reciprocal concurrently thereon side by side in opposite directions and having oppositely-inclined faces, a platen supported on said blocks and 'having oppositely-inclined faces engaged by the inclined faces of said blocks and means for reciprocating said blocks to advance or retract said platen, substantially as described.

7. An attachment for printing-presses embodying a base, blocks reciprocal concur rently thereon side by side in opposite directions vand having oppositely-inclined faces, and racks, a pinion meshing with said racks a platen supported on said blocks and having oppositely-inclined faces engaged by the inc 'ned faces of said blocks, and means for recprocating said blocks to advance or retract said platen, substantially as described.

8. An attachment for printing-presses embodying a base, blocks reciprocal concurrently thereon side by side in opposite direc tions and having oppositely-inclined faces and racks, a pinion meshing with said racks, a platen supported on said blocks and having oppositely-inclined faces engaged by the inclined faces of said blocks, means for slidably securing said blocks on said base and to said platen, and means for reciprocating said blocks to advance or retract said platen, substantially as described.

9. An attachment for printing-presses embodyinga base, blocks concurrently reciprocal thereon side by side in opposite directions, a platen supported on said blocks and a screw engaging one of said blocks for reciprocating said blocks to advance or retract said platen, substantially as described.

10. An attachment for printing-presses, a base, blocks concurrently reciprocal thereon side by side in opposite directions and having oppositely-inclined faces, a platen supported on said blocks and having oppositely-inyclined faces engaged by the inclined faces of said blocks and means engaging one of said blocks for reciprocating both of said blocks to advance or retract said platen, substantially as described.

Signed at New York, in the county of New York and State of New York, this 19th day of April, A. D. 1906.

HERMAN J. SCHOEN.

Witnesses:

A. R. APPLEMAN, M. I. MOSER. 

